android 系统上做GC双模的--modem 的被动消息处理

一、概述

在android 上做双模手机，CDMA EVDO模块主动上报消息在ril 层，应用层必须要做处理；

ril层主要是解析 URAT 上报指令，通过socket 传给java层，有java 来提示给用户

二、unsolicited 消息从modem上报到java的流程。

c++部份

readerLoop()

line = readline();

processLine(line);

handleUnsolicited(line);

if (s_unsolHandler != NULL) {

s_unsolHandler (line1, line2);//实际执行的是void onUnsolicited (const char *s, const char *sms_pdu)

if (strStartsWith(s,"+CRING:")

|| strStartsWith(s,"RING")

|| strStartsWith(s,"NO CARRIER")

|| strStartsWith(s,"+CCWA")

)

RIL_onUnsolicitedResponse (RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED, NULL, 0);

p.writeInt32 (RESPONSE_UNSOLICITED);

p.writeInt32 (unsolResponse);

ret = s_unsolResponses[unsolResponseIndex].responseFunction(p, data, datalen);

ret = sendResponse(p);

sendResponseRaw(p.data(), p.dataSize());

ret = blockingWrite(fd, (void *)&header, sizeof(header));

blockingWrite(fd, data, dataSize);

java部份

ril.java->RILReceiver.run()

for(;;)

{

...

length = readRilMessage(is, buffer);

p = Parcel.obtain();

p.unmarshall(buffer, 0, length);

p.setDataPosition(0);

processResponse(p);

processUnsolicited (p);

response = p.readInt();

switch(response) {

...

case RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED: ret = responseVoid(p); break;

...

}

switch(response) {

case RIL_UNSOL_RESPONSE_CALL_STATE_CHANGED:

if (RILJ_LOGD) unsljLog(response);

mCallStateRegistrants

.notifyRegistrants(new AsyncResult(null, null, null));

...

}